Luminescence Properties of Green-Emitting Phosphor (Ba1-x,Srx)2SiO4:Eu2+ for White LEDS
来源期刊：JOURNAL OF RARE EARTHS2006年第1期
论文作者：Shen Fang He Dawei Liu Hongli
Key words：phosphor silicate; luminescence; rare earths;
Abstract: The (Ba1-xSrx)2SiO4∶Eu2+ green-emitting phosphors were synthesized by conventional solid-state reaction in a CO-reductive atmosphere, and their luminescent properties were investigated. The XRD data show that the Ba/Sr ratio not only affects the lattice parameters, but also influences the emission peak. The excitation spectra indicate that this phosphor can be effectively excited by UV light from 370 to 470 nm. The emission band is due to the 4f65d1→4f7 transition of the Eu2+ ion. With an increase in x, the emission band shifts to longer wavelength and the reason was discussed. The emission spectra exhibit a satisfactory green performance under different excitation wavelength(380, 398, 412, 420, 460 nm). (Ba1-xSrx)2SiO4∶Eu2+ is a promising phosphor for green white-lighting-emission diode by ultraviolet chip.
Shen Fang1，He Dawei1，Liu Hongli1
(1.Ministry of Education Key Laboratory, Laboratory of Materials for Information Storage and Display, Institute of Photoelectron Technology, Beijing Jiaotong University, Beijing 100044, China)
Abstract:The (Ba1-xSrx)2SiO4∶Eu2+ green-emitting phosphors were synthesized by conventional solid-state reaction in a CO-reductive atmosphere, and their luminescent properties were investigated. The XRD data show that the Ba/Sr ratio not only affects the lattice parameters, but also influences the emission peak. The excitation spectra indicate that this phosphor can be effectively excited by UV light from 370 to 470 nm. The emission band is due to the 4f65d1→4f7 transition of the Eu2+ ion. With an increase in x, the emission band shifts to longer wavelength and the reason was discussed. The emission spectra exhibit a satisfactory green performance under different excitation wavelength(380, 398, 412, 420, 460 nm). (Ba1-xSrx)2SiO4∶Eu2+ is a promising phosphor for green white-lighting-emission diode by ultraviolet chip.
Key words:phosphor silicate; luminescence; rare earths;
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